Mining or in situ disintegration of hard material – Expansible breaking-down devices – Fluid-pressed element
Patent
1994-02-04
1995-03-21
Bagnell, David J.
Mining or in situ disintegration of hard material
Expansible breaking-down devices
Fluid-pressed element
299 23, E21C 3704, E21C 3710
Patent
active
053989988
ABSTRACT:
A pressure actuated fracture tool for use in splitting and fracturing hardened material, such as rock, stone, concrete and the like, having two expansible outer shells designed to move in opposition to each other along a selected axis transverse to the longitudinal axis of the tool. The outer shells define a central orifice extending longitudinally to length of the tool. An elastomeric tubular member is positioned in the central cavity between two longitudinally fixed end connectors. Upon the application of pressure to the tubular member, the outer shells expand outwardly in a determined radial diversion to contact the wall of a cavity bored in the hardened material and cause the material to cleave or split.
REFERENCES:
patent: 1630470 (1927-05-01), Clifford
patent: 4690460 (1987-09-01), Lebeder
Aeroquip Corporation
Bagnell David J.
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